If it's a side-load clamp, then yes you will have to replace the clamping mechanism. If you can find one, then do that otherwise you might just need to replace the post. Go for a 2-bolt vertical load post to make sure you're compatible with both carbon and metal rails. Whatever you do, DO NOT TIGHTEN YOUR CURRENT CLAMP TO THE RAILS. You will damage the carbon and possibly die a brutal death at high speed.

Specifically, you want part #421564, which just replaces the outer "ears" of the clamp with ovalized ones.

Now as for the rules on saddles:Metal rails are 7x7mm and will work with both side-load and vertical-load clamps.Carbon rails are 7x9mm (or 7x10mm depending on who you ask) and are compatible with vertical-load clamps. Most manufacturers sell ovalized clamps for carbon rails and side-load clamps.

you most likely can not replace the post. i may be wrong but im pretty sure the 6.9ssl has a trek proprietary seat mast cap on those frames. your best option would be to find out if your local dealer can find a new clamp like the one above

_________________"Ride till I die, well not really I'm too young to die"

Whatever you do, DO NOT TIGHTEN YOUR CURRENT CLAMP TO THE RAILS. You will damage the carbon and possibly die a brutal death at high speed.

Thanks for the reply. I've already tightened the clamp to the rails and was going to go for a flat ride to test it out this weekend! It seems to hold fine at the moment, but as mentioned, has already moved from level when I was putting weight (sitting) on it.I didn't tighten to anywhere near the recommended 16nm torque however, so apart from cosmetic, I shouldn't have damaged it.

sigismond0 wrote:

http://bontrager.com/model/06096"

Specifically, you want part #421564, which just replaces the outer "ears" of the clamp with ovalized ones.

The clamp I have looks exactly like the one in the first picture from your link.

I ran a braided rail Antares on my 6.9 ssl no issues you just need the clamp adaptors for the rails. There are 3 versions, round, 7x9 and 7x10. They cost about £10 IIRC. They are commonly referred to as "ears"

I ran a braided rail Antares on my 6.9 ssl no issues you just need the clamp adaptors for the rails. There are 3 versions, round, 7x9 and 7x10. They cost about £10 IIRC. They are commonly referred to as "ears"

OK, thanks.

So I def need the 7x10 adapter to fit the bigger 7x9.6 mm Antares rail, right?

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